Incompatibility with other substances: May react violently or explosivley with strong oxidiers such as fluorine,chlorine trifluoride, oxygen dichloride, manganese trifluoride.
Mixtures of magnesium with wet silica gel exploded violently. May react with burning sodium. Reacts with xenon hexa fluoride to form explosive xenon
Reactivity: Avoid excessive heat, generation of dust, moisture, all incompatible materials.
Mex you may have a bad combo of the magnesium in the aluminum reacting with moisture and pack.